I read a lot about successful people. And one of the reasons why one becomes successful while others do not is because successful people are more in charge of their time.
Successful people, for the most part, know what they're doing tomorrow. They've planned it out ahead of time. People who just wing through life, without a plan, are flying nowhere. They have no destinations in mind.
Oh, sure, they may say something like, "I want to be rich someday" or "I want to be published someday" but never sit down and figure out when that day will come or even plan how they're going to do it.
If you want to be successful, before you retire to bed tonight, sit with a blank piece of paper and write down five things you need to do tomorrow. Then, number them in the order of their importance. When you awaken tomorrow morning, look at the list and do the #1 thing. Not the #4 or #5 thing because they look easier. Do #1 until it is done.
As a writer, most of the time my #1 item is write X amount of pages or words. Then, once it's done, I read (for both pleasure and research) and even research what the market is like.
Do this for a week and then reflect back on your week. You'll be amazed at what you've accomplished.